| #6211 | Proceedings of the National Academy of Sciences of the United States of America. -- Washington : National Academy of Sciences, 1914-. -- ISSN 0027-8424 print. -- ISSN 1091-6490 online |
| #6212 | Proceedings of the Physical Society. -- London : Physical Society, 1926-1948. -- ISSN 0959-5309 |
| #6213 | Proceedings of the Physical Society, Section B. -- London : Physical Society, 1949-1957. -- ISSN 0370-1301 |
| #6214 | Proceedings of the Physical Society, Section A. -- London : Physical Society, 1949-1957. -- ISSN 0370-1298 |
| #6215 | Proceedings of the Physical Society. -- London : Institute of Physics and the Physical Society, 1958-1967. -- ISSN 0370-1328 |
| #6216 | Proceedings of the Physical Society of London. -- London : Physical Society, 1874-1926. -- ISSN 1478-7814 |
| #6217 | Proceedings of the Rhodesian of Engineers. -- Velká Británie : Salisbury : Rhodesian Institution of Engineers, 1965-1967 |
| #6218 | Proceedings of the Royal Society of London, Series A, Mathematical and physical sciences. -- London : Royal Society, 1934-1990. -- ISSN 0080-4630 |
| #6219 | Proceedings of the Royal Society of London, Series B, Biological Sciences. -- London : Royal Society, 1934-1990. -- ISSN 0080-4649 |
| #6220 | Proceedings of the Royal Society of London. -- London : Royal Society, 1855-1904. -- ISSN 0370-1662 |